Creation of A Tag Cloud
In principle, the font size of a tag in a tag cloud is determined by its incidence. For a word cloud of categories like weblogs, frequency, for example, corresponds to the number of weblog entries that are assigned to a category. For smaller frequencies one can specify font sizes directly, from one to whatever the maximum font size. For larger values, a scaling should be made. In a linear normalization, the weight of a descriptor is mapped to a size scale of 1 through f, where and are specifying the range of available weights.
for ; else
- : display fontsize
- : max. fontsize
- : count
- : min. count
- : max. count
Since the number of indexed items per descriptor is usually distributed according to a power law, for larger ranges of values, a logarithmic representation makes sense.
Implementations of tag clouds also include text parsing and filtering out unhelpful tags such as common words, numbers, and punctuation.
There are also websites creating artificially or randomly weighted tag clouds, for advertising, or for humorous results.
Read more about this topic: Tag Cloud
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